If 50.0 g of NaCl is mixed with 100.0 g of water at 80.0 °C, how much will not dissolve?

Answer 1

I don't have the solubility tables of thousands of compounds memorized. I look on the web and I see that about 40 g NaCl in 100 g H2O @ 80 C is a saturated solution; therefore, about 10 g NaCl will be left over if you start with 50 g NaCl. You could have looked this up on the web as I did.